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  • Back analysis of a natural jointed rock slope based on the photogrammetry method

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    100027_1.pdf (174.8Kb)
    Author(s)
    Kim, Dong Hyun
    Gratchev, Ivan
    Balasubramaniam, Arumugam
    Griffith University Author(s)
    Balasubramaniam, Bala B.
    Gratchev, Ivan
    Kim, Dong Hyun H.
    Year published
    2015
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    Abstract
    In 2013, a potentially unstable jointed rock slope above a road in the Gold Coast area, Australia, partially failed after a rainfall event. In this study, the rock failure was back analysed to evaluate the presence of key blocks through block analysis based on photogrammetry surveys. Friction angles of the joint sets at the point of failure were also investigated by means of a parametric study using a 3D distinct element method (DEM). The photogrammetry method was employed to obtain measurements of the orientation of the joint sets of the slope and the shape and size of rock blocks at the inaccessible slope. The joint ...
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    In 2013, a potentially unstable jointed rock slope above a road in the Gold Coast area, Australia, partially failed after a rainfall event. In this study, the rock failure was back analysed to evaluate the presence of key blocks through block analysis based on photogrammetry surveys. Friction angles of the joint sets at the point of failure were also investigated by means of a parametric study using a 3D distinct element method (DEM). The photogrammetry method was employed to obtain measurements of the orientation of the joint sets of the slope and the shape and size of rock blocks at the inaccessible slope. The joint roughness coefficient (JRC) obtained from the 3D photogrammetry model was utilised to estimate friction angles and the strength of the joint set. Safety factors of the rock mass were computed by both analytical and numerical approaches. Parametric analyses, using a DEM model, assessed the critical friction angle of the joint sets and also demonstrated the failure mechanism of the blocks. The result of this study indicates that the obtained safety factors are in agreement with the block analysis and the results from the numerical analysis performed by the distinct element code "3DEC".
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    Journal Title
    Landslides
    DOI
    https://doi.org/10.1007/s10346-014-0528-3
    Copyright Statement
    © 2014 Springer Berlin / Heidelberg. This is an electronic version of an article published in Landslides, February 2015, Volume 12, Issue 1, pp 147–154. Landslides is available online at: http://link.springer.com/ with the open URL of your article.
    Subject
    Civil Geotechnical Engineering
    Physical Geography and Environmental Geoscience
    Civil Engineering
    Publication URI
    http://hdl.handle.net/10072/66301
    Collection
    • Journal articles

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